Grease pump and the like



1932- H. J. ANDERSON ET AL 1,885,315

GREASE PUMP AND THE LIKE FiledMarch 18, 1929 s Sheebs-Sheet 1 fj zwzz in Q agar.

' Nov. 1,1932. H. J. ANDERSON ET AL I ,8

GREASE PUMP AND THE LIKE Filed March 18, 1929 5 Sheets-Sheet 2 HHHII II NOV; 9 H. J. ANDERSON ETAL 5,

GREASE PUMP AND THE LIKE Filed March 18, 1929 5 Sheets-Sheet 5 Patented Nov. 1,

UNITED STATES,

PATENT OFFICE HARRY J. ANDERSON Ann FRANK GORDON, or CHICAGO, ILLINOIS GREASETUMP AND THE LIKE Application filed March '18, 1929. Serial No. 348,046;

This invention has to do with certain improvements in grease pumps and the like; that is, machines for pumping grease and other relatively stiff or viscous materials.

The machines disclosed herein is especially intended for pumping such materials and delivering them to the bearings of machines in industrial plants, but it will presently appear that the device hereindisclosed may 30 also be advantageously used in many other locations and for other purposes. I

One of the objects of the invention is to provide a pump Which is so constituted that it is well adapted for delivering the grease under relatively heavy pressure. Another feature of the invention relates to the provision of a distributing valve or distributor in conjunction with such pump, said distributor being so arranged that it will periodically and in sequence deliver the grease to a number of different bearings which are to be-regularly lubricated. I l

A further feature of the invention relates to the provision of a unitary or self-contained outfit including the pump and the distributing valve, all of said parts belng mounted upon a common base and driven by a common source of power in proper timing Wlth;

variation of stroke by a variable radius ada justment for the pump plunger. In the case of a pump having a connecting rod of fixed length this variation 'ofstroke would result in a variation of top and bottom limits of plunger movement. delivering'such materials as grease, and especially in those cases wherethe material is delivered under a fairly heavy pressure, it

In the case ofa pump.

is desirable to bring the plunger as close aS possible to the upper or valve end of the cyl-' inder at the end of the working stroke so as to reduce the clearance as much as possible.

It is therefore; a further object of the invention to provide a pump structure having a variable stroke arrangement and also provided with a variable connecting rod arrangement so that the plunger can be adjusted to always come close tothe upper end of the cylinder at the end 'of the working stroke and irrespective of the'length of stroke.

It 'is a further object of the invention to provide various other adjustments for the operations of the distributing valve so that the same may be brought into proper timing with respect to the pump plunger operations.

Other ,objects of the invention are to pro-' vide astructure' of very rugged, and strong design, one which can be manufactured from 7 relative few parts and according to simple manufacturing operations, and one which will require little if any attention during long intervals of operation.

Other objects and uses of the'invention will appear from a detailed description of the same which consists in the features of construction and combinations of parts hereinafter described and claimed;

In the drawings: Figure 1 shows a plan view of a'ma-chine embodying the features of our present 'invention, the grease hopper being cut away so as to better illustratethe structures of the remaining devices. Figures 1 may also be considered as'a horizontal section taken on the line 1"1 of Figure 2, looking in the direction of the arrows; v

' Figure 2 shows an end view corresponding to Figure 1, but with the hopper in place Figure 3 shows a side View corresponding to Figures 1 and 2; andjFigure' 4 shows a vertical section through the pump proper, and illustrates particularly the adjustments 95 of the stroke and of the length of con-n'ecting rod. Figure 4 may be considered a frag mentary section on the line l 4t of Figure 2 looking in the direction of the arrows;

In the'drawings we have, for purposes of 100 convenience, shown the various devices as being mounted on a common base block or plate 6. At one side thereof there is located a driving shaft 7 which is journaled in a pair of journal brackets 8 and 9 projected up from the base block. This driving shaft 7 is at one end provided with a driving pulley 10 by means of which the power is delivered from a suitable source such as a driving motor, and line shaft, or other element.

The driving shaft 7 also carries at its other end a disk 11 which is transversely slotted with a key slot 12 to receive the enlarged head 13 of a stud 14. This stud may be set at any desired radius and then locked in place by means of a nut 15 in any convenient manner. The stud 14 also carries an eccentric head or strap 16 which in turn is connected to a link 17; such connection being made through the medium of a pin and socket connection 18 (see Fig. 2) and locked by means of a set screw 19 (see Fig. 1). 7

At the other side of the machine from the position of the driving shaft 7 there'is located a jack shaft 20. The same'is parallel to the driving shaft 7 and is carried by means of a pair ofbrackets 21 and 22 (see Figs. 1 and 3). This jack shaft 20 is provided with a toothed wheel 23. An arm 24 is swingingly mounted on the shaft 20, and the link 17 is pivotally connected to the lower end of said arm. Consequently the back and forth movements of link 17 are converted into back and forth swings of the arm 24. There is another arm 25 connected to the arm 24, said arm 25 carrying at its free end a box 26 in which is located a pawl 27 which is spring pressed the ratchet wheel 23 so that the tooth of said pawl will properly engage said ratchet wheel to drive the same forwardly with a step by by step motion.

There is another box 28 carried by a bracket 29 reaching upwardly from the base plate 6. A pawl 30 located in this box 28 is spring pressed against the ratchet wheel 23 and serves to catch and hold the same against backward movement.

The jack shaft 20 carries a pinion 31 which drives a gear 32 on a pump shaft 32. Said pump shaft is journall-ed by the brackets 34 and 35 mounted on the base plate.

At the rear end of the base plate there is located a stand 36. This stand is hollowed out to provide an opening or chamber 37 from which there is an upward extension or continuation 38 forming a vertical pump cylinder. A pump plunger 39 works in said cylinder, said pump plunger being provided with piston rings or the like 40 of conventional design.

A driving disk 41 is secured to the end of the pump shaft 33. This driving disk is transversely slotted with a key slot 42 (see Figs. 3 and 4) and a stud 43 has an enlarged head 44 located in said key slot. A nut 45 on the stud serves to lock the same in place.

The surface of the disk 41 is transversely toothed or serrated as shown at 46 (see Figs. 3 and 4) and the stud 43 carries a block 47 which is similarly toothed or serrated. The engagement of this block therefore serves to hold the stud 43 at the desired position of eccentricity regardless of the degree of tightness of the nut 45.

There is a sleeve 48 on the stud which reaches through to the position of the block 47 so that upon tightening up on the nut 45 the pressure is communicated directly through said sleeve to the block 47. Preferably also, a flange or washer 49 is placed between the nut 45 and the sleeve48.

The connecting rod has its lower end working on the sleeve 48; but said connecting rod is of slightly less size than the sleeve so that when the nut 45 is tightened up the freedom of movement of the connecting rod will not be impaired.

There is a two part connecting rod extending between the stud 43 and the plunger 49. This connecting rod has the upper and lower sections 50 and 51. The companion faces of these sections are serrated so that they will lock together at any desired position of adjustment; and a stud 52 is used for accomplishing this purpose. The lower connecting rod member 51 is journaled on the sleeve 48 on the stud 43, and the upper connecting rod section 50 is connected to the plunger 39 by a piston pin 53.

The cylinder head is established by a cross block 54 above which is located the valve house 55. These parts are all drawn together by screw studs 56 as will be readily apparent from Figure 2 in particular.

The valve house 55 is provided with an inlet passage 57 which reaches down from a hopper 58, and is also provided with a dis charge passage 59 which reaches upwardly and then sidewise to receive a nipple 60. An inlet ball check 61 works against a seat in the upper end of the passage 57 and a delivery ball check 62 works against a seat at the bottom end of the passage 59. These ball checks are preferably spring pressed as clearly evident from Fig. 2.

The hopper 58 may be removable if desired; but it is preferably provided with a downwardly sloping bottom surface 63 as shown in Fig. 2.

It will now be evident that the length of the connecting rod may be adjusted to correspond to the adjustment of eccentricity so that the plunger will always work close to the cylinder head 54 at the end of the work stroke. Consequently the clearance may be kept at a minimum amount even when the plunger is working on very small strokes.

Located at a convenient position and preferably above the jack shaft 33 is a horizontal cylindrical valve housing 64. The ends thereof are carried by brackets 65 and 66 which reach up from the base plate 6 to a suflicient elevation. The valve housing 64: lies parallel to the jack shaft 20 and the pump shaft 33. Said valve housing is provided with an inwardly extending cylindrical bore 65 which is of uniform size to the position of a shoulder or seat 66 near its left hand end as shown in Figure 3. A cylindrical valve plug 67 is set into the bore 65 from the right hand end of the structure when viewing it as in Fig. 3 and said valve plug 67 is provided with a reduced or shouldered portion'which comes up against the shoulder 66 and said reduced or shouldered portion then reaches out through the end of the valve housing as shown in 68 in Fig. 3. This extending or projectingportion 68 is provided with a ratchet wheel 69 which when driven serves to rotate the valve plug.

The other end of the valve housing 64 is closed by a cap 70 after the valve plug has been set into place. Said cap 70 is held rigidly in place by the tap screws 71; and the cap 70 is provided with a boss 72 to receive a nipple 73. A flexible hose 7t joins the nipple 60 to the nipple 73 so as to deliver the grease into the housing 64 in the right hand end of Figure 3.

The valve plug 67 is provided with a longitudinally extending bore 75 which reaches inwardly from the right hand end of Figure 3 and said bore 75 terminates about opposite to the position of the shoulder 66. The grease is thus allowed to move through the length of the bore 75 from the right hand end of F igure 3.

The valve plug 67 is provided with a series of ports 76 which deliver radially outwards,

and said ports are located in spiral fashionaround the valve plug 67 so that as said plug is rotated these ports come successively into register with a given longitudinally extending plane.

The valve casing 64 is provided with three longitudinally extending flattened faces 77, 78 and 79 along its top and side portions. Either of these faces may be drilled with a series of passages corresponding to the locations of the ports 76. In the .particular construction illustrated the top face 77 has'been drilled and it receives a series of delivery pipes 80 located in line with the respective ports 7 6. Consequently as the valve plug is rotated the grease will be delivered to the different pipes 80 in succession. For this purpose it is preferred that delivery'to one of said pipes should be discontinued before delivery to the next pipe is commenced, but if desired there may be established an overlap in the sequence of such delivery.

The rotations of the valve plug are produced in such timing with respect to the strokes of the pump plunger as will insure delivery of the grease to the desired pipe 80 when the pump plunger performs its working stroke. For this purpose there is a block 81 secured to the end of the pump shaft 33.

This block 81 is transversely slotted with a key slot 82 into which is placed a stud 83 having an enlarged head 84:. A nut 85 on said stud serves to lock the stud into the keyway.

A block 86 has an eccentric strap 87 working on the stud. Said block 86 is connected to a link 88 by means ofan adjustment connection 89 so that the length of said link can be adjusted. The other end of the link contion.

There are the same number of teeth in the disk 69 as there are ports 76 in the valve plug 67. Furthermore, by adjustment of the length of the arm 88 and also by adjustment of the position of the stud 83 it is possible to bring all of the parts into such harmonious relationship that the valve plug will be ro-" tated each time to the exact position for delivery to one ofthe pipes 80.

85 when the arm is swung in the feeding direc- It is also noted that the parts are so adjusted and timed that the valve plug 67 is being rotated during the interval that the pump is on the down or suction stroke. During the up or working stroke of the pump the valve 67 remains stationary so that the proper registry of ports is maintained during the entire interval of grease delivery.

It will be noted that the delivery pipes 80 can be set on to either of the faces 77, 78 or 79 after the face has been drilled to receive said pipes, so that the pipes can be led away from the distributing valve in the most convenient manner depending upon the installation.

While we have herein shown and described only a single embodiment of the features of our present invention, still we do not intend to limit ourselves thereto except as we may do so in the claim.

We claim:

In a device of the class described, the combination of a pump shaft, a rotary valve, a reciprocating pump in conjunction with one end of said pump shaft, a pawl and ratchet connection between the other end of the pump shaft and the rotary valve, means for varying the stroke of the pump, and adjustable means between the pump shaft and the valve for adjusting the operation of the valve from the pump shaft, substantially as described.

- HARRY J. ANDERSON.

FRANK GORDON. 

